AFR 230cc LS1 Mongoose CNC Cylinder Heads 62cc Combustion Chamber - Assembled

AFR 230cc LS1 Mongoose CNC Cylinder Heads - Assembled

Built for those aggressive street or street/strip LS builds, AFR's 230cc LS1 Mongoose heads are crafted to bring power to LS1 engines up to 427 cubic inches, hitting up to 7200 RPM with ease. This head setup flows a strong 328 CFM at 0.650" lift, tailored for those looking to maximize performance in a naturally aspirated setup. The 100% CNC ported combustion chambers, intake and exhaust ports deliver optimized flow and velocity, making these heads a solid pick for anyone serious about getting the most out of their LS platform.

Included Components

• 8mm Bead Lock Intake Valve: 2.080" x 4.900" O.A.L., AFR #7208
• 8mm Bead Lock Exhaust Valve: 1.600" x 4.900" O.A.L., AFR #7228
• PAC Racing Spring: 1.270" OD, 155 lbs. on seat, .650” max lift, Max RPM 7000-7200, AFR #8019
• Titanium Retainers: 7° 1.245" O.D x .885" I.D, AFR #8512
• Viton Valve Seals: .600" O.D x .495" I.D, AFR #6612
• Hardened Valve Spring Locator: 1.380" O.D x .570" I.D, AFR #8042
• Bronze Valve Guides: 8 mm x 2.100" O.A.L, AFR #9051

Note: LSX bead locks and AFR locks align with GM LSX specifications but differ from other aftermarket bead locks.

Flow Chart

Specifications & Features

• Material: A356 Aluminum
• Intake Port Volume: 230cc
• Exhaust Port Volume: 86cc
• Combustion Chamber Sizes: 62cc, 65cc, or 72cc
• Deck Thickness: .750"
• Minimum Bore Diameter: 3.900"
• Valve Angle: 15°
• Spark Plug: 14mm x .750" Tapered Seat
• CARB Status: Not for emission-controlled vehicles; race-use only.

Recommended Components

• Intake Port Gasket: GM or FAST
• Exhaust Port Gasket: GM#12558573
• Head Gasket (Small Bore): Cometic 3.930 .040" or AFR #6846
• Head Gasket (Large Bore): Cometic 4.160 .040" or AFR #6848
• Head Bolts (97-03): ARP 134-3609 or AFR #6330
• Head Studs (97-03): ARP 234-4110 or AFR #6331
• Suggested Manifold: FAST 90mm, 92mm, or 102mm
• Spark Plug Starting Range: NGK TR55